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本帖最后由 凯利之王 于 2009-7-13 09:48 编辑! `- ]* L) X/ `
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凯利指数的计算方法: ( O1 m2 a L3 d; F& D k9 M8 F. w' I6 Z1 T% n
" K% o% Y$ k: L4 Z+ Q
G3=S*S',G1=B*B',G0=F*F';(S:胜赔,B:平赔,F:负赔,S'欧平均胜率,B'欧平均平率,F'欧平均负率)
+ q& ~( R$ [, p/ i4 ?* K9 D& C什么?对于一家特定的公司,它的主胜的凯利指数G3=S*S'!你选择的公司样本不同,G值就不同,样本大小不同,G值也不同(一般的欧均值都取99家公司,从统计学的意义上来讲,还称不上样本!)这个G带有随意性,大个0.05小个0.08之类的,也只能算做误差,现在要我比较G与0.89哪个大?我大你个0.05怎么了?我小你个0.08又有什么干系? H% P+ \' B9 l U8 T. [8 I5 [# X9 J5 C
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& t" ]0 @) w! L( u* H% h$ A7 I* E, t+ }% s9 V# R8 B6 U& ~
既然涉及到平均胜率,那么看一下胜率是怎么求出来的:平均主胜率S'=(S1'+S2'+….Sn')/n,S1'是第一家公司的主胜率,S2'是第二家公司的主胜率,以此类推。主胜率S'=r/S(r:赔付率)。赔付率(返还率)又是这样求的:r=1/(1/S+1/B+1/F),什么??又做梦了!!返还率是庄家也要到裁判终场哨响才知道的,这样也行??AC米兰踢亚特兰大,哨响了,投注比固定了,但踢出3,这场返还率可能是150%,踢出1可能是20%,踢出0,可能是5%,结果不同,返还率也不同啊!这里也可以看到,博彩公司不喜欢操控比赛,因为他想操控的只能是这种强弱分明的比赛,但强队踢假球的成本更高,它想操控也操控不了,最好的选择就是烧烧香:天哪,爆个冷吧!
! o7 y2 m! `- q% |7 F7 e6 Z/ _5 C5 S: K8 T8 s
- r) r8 D. x% a# \ E做下算术了: 2 i( y$ \ W: ~: {8 \" `3 T$ r3 C3 H8 h" K3 Y; ^: E C7 q# D
; ~' L. y! k5 F, M& W+ d
4 f" p3 r5 I( X: @+ f: u$ C- m(1)SSP: 2.22 3.15 3.01 : `4 u/ N9 a2 y W3 e8 }9 n* x% z! L* P3 M6 m+ L
$ v3 f8 n" e2 m* e: j: e V(2)立博: 2.10 3.25 3.00
6 `- t n+ U5 l# d7 Z1 c+ G
/ |, Y1 z! l2 o# Q; ~ l(3)威廉: 2.20 3.10 2.87 : D' ~# K. v* J, ^* k$ [ t3 c1 Y- g5 c9 X' u" \4 k
; P6 s8 ?% @5 z( T0 o$ g9 q
(4)易胜博:2.25 3.10 2.95
5 a4 W% D. f. ~5 i) _- U+ {+ l. `) m% ~. _& d" I1 I: W+ P
我们假设就取这四家公司为某场比赛开出的赔率来计算凯利值 8 E' c* G( `; }
5 F8 F, p$ }' ]( i% c- c- U! m$ M" a; d& r- h
S1=2.22 B1=3.15 F1=3.01
$ g/ `% C- e5 I6 H9 t g. h! O2 h; p# s, z9 I; Z
S2=2.10 B2=3.25 F2=3.00
* s6 f( K! P5 C- c+ R& o% ^# T/ X4 W2 j% ] s
) m( c3 ]- k# v2 x, I2 ~) p& _S3=2.20 B3=3.10 F3=2.87
; W+ W7 l. b; _1 E1 U. O4 I9 A' e& q. H7 B1 c9 S5 j
, O; l4 a+ h5 x4 @S4=2.25 B14=3.10 F4=2.95 ! ~0 p7 C' v# @. v; y G+ \
' l" F3 @7 f- u$ Y: p8 w( d5 ` _0 H- N/ h7 V4 v
, G6 ^. W3 [; M; c) Y, J1 `1/r1=1/S1+1/B1+1/F1=1/2.22+1/3.15+1/3.01 => r1=0.91 9 Q1 U! Q3 l% x/ X
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1/r2=1/S2+1/B2+1/F2=1/2.10+1/3.25+1/3.00 => r2=0.90 # t0 ?( P e* X% l3 K: d1 k: x* @4 v' }
* {0 f& }. G) T$ w$ c: c( h1/r3=1/S3+1/B3+1/F3=1/2.20+1/3.10+1/2.87 => r3=0.89 % h8 r* k9 }8 X/ Q5 J' q
0 ` N R* r+ p4 G, }7 C
}6 Z* F! @1 u/ a1/r4=1/S4+1/B4+1/F4=1/2.25+1/3.10+1/2.95 => r4=0.90 3 K3 g' Y& x; |/ e" C1 Q/ N, {
: G+ x9 Y- y- K6 r! ^# H9 z$ P f
S1'=1/(S1*r1)=1/(2.22*0.91)=41 : W# q# m$ g# T
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类似的计算后,于是: # s3 M- z! s6 q8 s- Z8 M j
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S1'=41 B1'=29 F1'=30;
$ `% I5 X5 U: [6 V" l L5 G, O0 W. N. _
) j( \0 @3 ^" f$ a1 D/ f$ |. j; r; [S2'=43 B2'=28 F2'=30 3 e- T: x' @% _% l" w5 s1 o5 C& x# {: m" q( }4 V2 u
; m' V% T, u, P% O
) k( W! N2 v: CS3'=40 B3'=29 F3'=31
6 E* j7 y& s7 _- r" w# g5 B6 z5 K/ n5 u, C9 L, h+ }+ O/ i% a
y& @! y8 N0 w2 q0 W6 aS4'=40 B4'=29 F4'=31 5 _2 c# v6 m' `
: B6 y" Y' M2 }4 T/ O0 g4 ~
: K$ _ B- [0 t/ B# k @2 |0 f0 a(注意:3,4两家公司,赔率不同,但它们的胜,平,负率相同了) 8 [+ b0 b& X# U( [. o1 v+ g5 R+ m5 _" t7 A! u
* R9 Y/ Q" p9 \
& m, B4 h5 K9 s8 S/ ?% ~' ~" i好:S'=(S1'+S2'+S3'+S4')/4=(41+43+40+40)/4=41 9 ~# R9 l8 Y$ F; v3 y+ A2 r* q
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; }7 r1 o1 R: L4 [B'=(B1'+B2'+B3'+B4')/4=(29+28+29+29)/4=28.75
% l3 T2 n- p W- t( H3 F, }8 m. A4 ~0 s2 k4 `
F'=(F1'+F2'+F3'+F4')/4=(30+30+31+31)/4=30.5 % p" G n6 a# C: v; n, n
0 ~% j* L* |8 n0 X
于是: / s+ X- G$ g6 i& P E8 u9 j! |0 ?
& r7 L; N8 H2 @2 t& J4 Q/ g9 E ]' p: I. D7 h. {, j. |# ~! V, _, `6 ?$ x- m" {
G31=S1*S'=2.22*41=91.02 ! B$ E, |, X) y+ M
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5 d+ H {* g! E1 Z# H3 p& Z, wG11=B1*B'=3.15*28.75=90.56 " v9 C( E3 D2 t' H5 [) [" S$ z
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G01=F1*F'=3.01*30.5=91.8 2 b6 B# O% q. }" I: W0 ]
& @4 _, a9 O* W6 B: C% P% k% `4 U" k
当然其它几家公司的凯利值也可以通过同样的方法求得,当然,事实上你不用去求(每场比赛这样求,不累死也气死了),赔率比较网站上都是这样算的。 好,到这里你应该可以知道了,凯利指数是怎么样被扭曲的了,因为除了赔率是真的,其它的都是做梦的时候梦到的(并非是攻击凯利指数,这个,前文和接下来的一比较就可以发现了)。 + J& N& @* n# J/ ]6 \. \! J" P/ Y0 @8 g+ b u# n
6 C* |* h W0 f7 S7 s3 A2 @. G$ i8 i D/ D5 | o# D! J0 D$ P7 O
通过对多家凯利指数的对比统计分析可以找出,数值变化与赛果之间的微妙关系,在足彩分析投注中能把握更多的冷门机会。 |
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数值变化与赛果之间的微妙关系,在足彩分析投注中能把握更多的冷门机会。 |
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